Shutter mechanism.



A. G. ROEBUGK.

SHUTTER KEOHANI8H. Agrmomrox nun J41. so, me.

Patented Jan. 12, 1909; a snnnrknnnr 1.

A. '0. ROEBUGK.

SHUTTER MECHANISM.

APPLICATION FILED JAN. 30, 190B.

Patented Jan. 12, 1909.

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A. G. ROEBUGK.

SHUTTER MECHANISM.

urmouzon FILED JAN. a0, 1908.

Pateated Jan. 12, 1909.

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Jim/z. C. 3 06601067 I ALVAH C. ROEBUCK, OF CHICAGO, ILLINOIS.

mmammm Specification of Letters Patent.

ratenteuan. 12 1909.

Application filed January 30, 1908'. Serial No. 413,346.

To all whom it may concern:

Be it known that I, ALVAH O. Ronsncn, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and. State ofIllinois, have invented certain new and useful Improvements in ShutterMechanisms, of which the following-is a specification. V

This invention relates to the light controlling shutter mechanism usedin the intermittent feed type of kinetoscopes, and has for its object toprovide a simple and efficient structural formation and arrangement ofthe shutter parts whereby a very extended path for the shutter bladeswithin a prescribed space in the kinetoscope housing is attained, withthe results of a corresponding inafter more fully appear.

In the accompanying drawings illustrative of the present invention:Figure 1, is a general side elevation of the kinetoscope. Fig. 2, is adetail front elevation, with parts of the housing in section. Fig. 3 isa detail horizontal section on line m-w, Figs. 1 and 2. Fig. 4 is adetail elevation of the shutter. Fig. 5, is a detail section of same online mm Fig. 4.

Similar numerals of reference indicate like .parts in the several views.

Referring to the drawings, 1 represents the supporting frame or housingof the kinetoscope, preferably of the closed form shown, and in whichis, arranged the film feeding and light controlling mechanisms for thekinctoscope, and such film feeding mechanism being of any suitable formbut pref- 5 and 6, with the carrying shafts of the twin or duplex lightcontrolling shutter, and through otherintermediate gears with the filmfeeding, and other usual mechanisms of the kinetoscope, inorder' thatsuch different mechanisms may operate in unison.

7, is the projecting lens or objective at the front end of thekinetoscope housing, and. 8 is a horizontally swinging gate at the rearend of said housing for confining the pictured film in its verticaltravel past a light passage 9 in the rear wall of the housing 1, suchlight passage has'a symmetrical arrangement with relation to theItiOCtlhflXlS- of the apparatus, and said focal axis 15 indicated by thedotted line on Fig. 1.

10, is a vertical diaphragm arranged 111 a. containing recess formedtherefor inthe rear wall of the housing 1. Such diaphragm is formed withthe light passage 9 aforesaid, and with vertical ribs or slidewa-ys 11at the sides of such passage and upon which the film 12 slides in itsvertical travel through the apparatus.

In the present construction the twln 'or duplex light controllingshutter, before referred to consists of two bladed members 13 and 14;having rotation in opposite .directions around a common axis and withtheir blades adapted to intermittently screen the light opening 9 of thekinetoscope, as usual in the present type of duplex shutters, and withthe usual object that the shutter opens and closes from top to bottom atthe same time and thus avoid the loss of any more light than isnecessary in the closing of the light aperture preparatory to themovement of the film, and the opening of the light aperture after themovement of the film, it being obvious that any reduction in the periodof darkness or non exposure. reduces the amount of flicker in thepicture in like proportion. In the present improvementsaid shuttermembers are of the truncated cone the focal axis of the apparatus, andso that the. shutter blades as they move past the 55. blades forming thecone portion of the shutlight opening 9, will havemovement in a planeparallel to said opennw. lVlth such arrangement of parts the shutterblades have movement'in a very extended. path While-at the same tune averyqcompact arrangement.

of the shutter parts is-attained. Within-the innetoseope hous ng. 15, isa tubular shaft carrying the shutter member 13, and journa'led in themainhoasing 1 as hereinafter set forth.

16, is acentral shaft carrying the shutter member l i; such shaft isarranged in ,the'

bore of the tubular-shaft l5 and also journaled in the-main housing.

Hand 18 are bevel gears carried by'the respective shafts l5.an'd l6aforesaid.

19 is a hotel gear."meshing with and driving the aforesaid bevelgears l?and 1S,- and their respective shutter carrying shafts l5 and 16 inopposite directions.

20, .is an intermediate-'shaft carrying the bevel gear 19 atone end, andat the other end a second bevel gear '21 which meshes with and is drivenby a bevel gear 22 attached to the gear wheel 6. of the before described train of driving gears.

23 and :H are sleeves integrally formed with a side wall of the mainhousing 1, and in right angle rclatlonfto.eaclrother; such' sleeves havecircular-bores with their axis on a horizontal plane, and with the {1X15of the bore of the sleeve'ili in theoblique position as heretoforedescribed.

5 is a ournal bushing fitting the sleeve 23 in relation to the'focalaxis of the apparatus,

aforesaid, and having removable end heads The bushings and headsjustdescribed are held in place by set screws or other usual fasteningmeans, and as so arranged, a ready dismeniberment of the parts for,repairs, and the like, can be conveniently effected.

1 Having thus fully described my said invention what 1 claim as new anddesire to secure by lietters latent, is

-1 In a kinetoscope, the combination of a main frame or housing havingalight pas- .si'ige, a shutter-controlling said light passage and havinga truncated cone form with air, the axis of rotation of the shutterbeing in a plane oblique to the focal axis of the light passageaforesaid, and means for im- 'iart'ingrotatioii to theshutter,substantially as set forth.

- 2. lira. kinetoscope, the combination of a mainframe or housing havinga light pas-' sagei-a shutter controllin said light passage and. Shavinga truncatedcone form with sage and comprisinga'pair of shutter memandmeans for imparting rotation to such main frame or'housin same, ashutter controlling sa dhght passage;

sooner bladesforming the cone portion of the shut ter, the axis ofrotation of the shutter being one. horizontal plane and oblique to thefocal 1 axis of the light passage aforesaid, and means for impartingrotation to the shutter, substantially as set forth.

3. In a kinetoscope, the combination of a main frame" or housin havingalight passage, ashntter controlling said light passage and comprising apair. of shutter members having their axis of rotation arrange obliqueto the focal axis of the light passage and blades arranged in conicalrelation to said axis ofrotation, and means for imparting rotation tosuch shutter members in opposits directions, substantially asset forth.I l. lin-a hinetoscope, the combination of a main frame or housinghaving a light pas-f.- sage, a shutter controlling said lightpasbershaving their axis ofrotation arranged on a horizontal plane and obliqueto the focal. axis of the light passage and blades arranged in conicalrelation to'said axis of rotation,

sh 'itter members in opposite directions, substantially as set forth.

lna lnnetoscope, the combination of a main frame or housing havingalight passage, 'a shutter controlling said light passage and comprisinga pair of shutter members.

havin their axis of rotation arranged oblique to the focal axis of thelight passage and. blades arranged. in conical relation to said axis ofrotation, and means for imparting rotation to such shutter members inopposite directions, the same comprisinga holloivshaft carrying oneshutter member, a central shaft carrying 'the other shutter member andpassing through-the hollow shaft, bevel gears secured to the respectiveshafts, a bevel gear meshing with said bevel gearsand adapted toarotatethesa me in opposite directions, an intermediate shaft carrying saidbevel gear, and means for imparting rotation to saidintermediateshaft,substantially as set-forth.

6. In a kinetoscope, the combination of a. having alight pas andcomprising .a pair of shutter members having their axis of rotationarranged oblique'tothe focal axis of'the light passage and, bladesarranged in conical relation to said axis of rotation, andm'eans forimpart 2 ing rotatio n to si'ich shutter members in opposite directions,the samecomp'rising a hollow shaft carrying one shutter member, acentral shaft carrying the other 7 shutter member and passing throughthe hollow .125 shaft bevel gears secured to the respective" shafts, abevel gear meshing with said bevel gears and adapted to rotate the samein u posite directions, an intermediate shaftlcarrying said bevel gear,a main drivingshaft, 130 I operative normed-ions between the interine-Signed at Chicago, Illinois, this 27th day chute shaft aforesaid and themain driving of January, 1908.

formed therefor in the main housing and providing bearings for theshutter carrying Witnesses:

and intermediate shafts aforesaid, substan- E. J. W LLIAMS, tialiy asset forth. ROBERT BURNS.

shaft, and removable bushings fitting bores ALVAH C ROEBUCK

